Full, thick, natural-looking arches are in but if you've ever over-tweezed your arches, you know the struggle of trying to grow your brows thicker. Enter the latest game-changer, Rapid Lash Eyebrow Enhancing Serum. Formulated with a blend of fortifying proteins, stimulating peptides and nourishing ingredients, this brush-on serum improves eyebrow density while adding glow and softness to your arches. The clear formula sets brows in place while continually delivering a potent concentration of their exclusive Hexatein®2 Complex.